Cron Expression: 0 3 * * *
Every day at 03:00 (3 AM).
Field Breakdown
| Field | Value |
|---|---|
| Minute | 0 |
| Hour | 3 |
| Day of Month | * |
| Month | * |
| Day of Week | * |
Common Use Case
Database VACUUM, log rotation, certificate renewals.
Sample Fire Times (UTC)
| When | Unix Timestamp |
|---|---|
| 2026-05-06 03:00 | 1778036400 |
| 2026-05-07 03:00 | 1778122800 |
| 2026-05-08 03:00 | 1778209200 |
| 2026-05-09 03:00 | 1778295600 |
| 2026-05-10 03:00 | 1778382000 |
Sample times computed at build; your scheduler will fire on its own clock.
Equivalents in Popular Schedulers
crontab (Linux/macOS)
0 3 * * * /path/to/your/script.sh
GitHub Actions (.github/workflows/*.yml)
on:
schedule:
- cron: '0 3 * * *'
AWS EventBridge (cron format)
cron(0 3 * * *) # Note: AWS uses 6 fields with year
Kubernetes CronJob
spec: schedule: "0 3 * * *"